<template>
    <div class="login_contain">
        <div class="login_box">
          <!--头像区域-->
          <div class="avatar_box">
            <img src="../assets/logo.png" alt="">
          </div>
          <!--登录表单-->
          <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
            <!--用户名-->
            <el-form-item prop="username">
              <el-input v-model="loginForm.username"  prefix-icon="iconfont icon-user"></el-input>
            </el-form-item>
            <!--密码-->
            <el-form-item prop="password">
              <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
            </el-form-item>
            <!--登录按钮-->
            <el-form-item class="btns" >
                <el-button type="primary" @click="loginLoginForm">登录</el-button>
                <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
          </el-form>
        </div>
    </div>
</template>
<script>
export default {
  data () {
    return {
      // 表单中的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入用户名称', trigger: 'blur' },
          { min: 3, max: 5, message: '长度在 3 到 5个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入用户密码', trigger: 'blur' },
          { min: 6, max: 8, message: '长度在 6 到 8个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置登录表单
    resetLoginForm () {
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    loginLoginForm () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        console.log(res)
        if (res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        // 1,将登录成功后的token，保存到客户端的sessionStorage中
        //    1-1,项目中除了登录之外的其他接口，必须在登陆之后才能访问
        //    1-2,token 只应该在当前网站打开期间生效，所以将token 保存在sessionStorage 中
        window.sessionStorage.setItem('token', res.data.token)
        // 2,通过编程式导航跳转到后台 主页，路由地址是/home
        this.$router.push('/home')
      })
    }
  }
}

</script>
<style lang="less" scoped>
.login_contain{
  background-color: #2b4b6b;
  height: 100%;
}
.login_box{
  width: 450px;
  height:300px;
  background: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top:50%;
  transform: translate(-50%,-50%);

  .avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
    img{
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.login_form{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing:border-box;
}
.btns{
  display: flex;
  justify-content: flex-end;
}
</style>
